Connecting plug receptacle



March 21, 1933. R. M. HEINTZ y CONNECTING PLUG RECEPTACLE Filed Nov. 24,1930 RALPH H. HEIN TZ INVENTOR, A

/f ATTORNEY Patented Mar. 2l, 1933 UNITED STTES PATENT OFFICE RALPH M.HEINTZ, 0F PALO ALTO, CALIFORNIA, ASSIGNOR TO HINTZ & KAUFMAN, LTD., 0FSAN FRANCISCO, CALIFORNIA, A CORPORATION OF NEVADA CONNECTING PLUGRECEPTACLE Application led November 24, 1930. Serial No. 497,81|7.

'This invention relates to receptacles for electrical connecting plugs,and its broad purpose is to provide a receptacle whereon the arrangementof the connections to the receptacle may be quickly and easily changedwithout the use of tools, and wherein these connections are of highconductivity and are not subject to accidental dislodgment.

Other objects of this invention are to provide a receptacle having fewand simple parts, and to providea receptacle wherein the contacts withthe plug are firmly made and of low resistance.

The inventio-n possesses numerous other objects and features ofadvantage, some of which, with the foregoing, will be set forthin thefollowing description of the invention. it is to be understood that I donot limit myself to this disclosure of species of this invention, as Imay adopt variant embodiments thereof within the scope of the claims.

Referring to the drawing:

Figure 1 is a front view of a three-contact plug receptacle.

Figure 2 is a rear view of a receptacle similar to Figure 1.

Figure 3 is a sectional .View through one of the contacts and itsconnecting leads, the plane of section being indicated by the line 3 3of Figure 2.

The receptacle of this invention is primarily designed for use where theconnections to the receptacle must be removed from time to time, eitherfor the purpose of disassembling the device Whereon the receptacle ismounted, orbecause the connections to the receptacle must be changed inorder to provide changes of speed, voltage, or the like, in the devicesupplied by the receptacle.

Broadly considered,. the invention comprises the usual base-plateapertured lto receive the prongs of the connecting plug. Se cured to therear of the base-plate is a resilient contact strip, preferably bent toform a loop aligned with the aperture in the baseplate to receive thecontact prongs. In electrical connection with the Contact strip is asocket member, adjacent to the opening in which is a latch, preferablyformed from the be removed at any time by holding back the latch withthe fingers and simply Withdrawing the plug from the socket.

The invention is shown, in a preferred form, ih the drawing, wherein thebase-plate 1 is provided with the three apertures 2 for receiving theprongs of the connecting plug.

The contact strips are mounted on the back of the base-plate, eachpreferably comprising a. loop 3 projecting perpendicularly to the planeof the base-plate and having a free end i projecting through theaperture 2 and bent at right angles to overlie the front surface of theplate 1.

'From the other end of the loop a portion 5 of the strip is bent tocontact the inner surface of the base-plate, beyond which the end of thestrip is again vbent outward and back toward the loop to form a hookedlatch 7. The portion 5 of the contact strip is provided with a hole forreceiving the reduced end 8 of a cylindrical socket member 10, whoseopen end lies immediately below the hooked end of the latch 7. Thereduced portion 8 ,extends thro-ugh a hole in the baseplate, where it isriveted to secure. the contact strip to the plate.

A contact plug 11 is formed to slip readily within the socket. This plughas a flange surface 12 formed upon it, the flange preferably beingconical in shape as viewed from the outer end of the plug, and having aflat upper surface against which the hooked end 7 of the latch bears.The lead wire 13 is soldered or otherwise secured into the plug.

It will thus be seen that if the end of the plug is inserted in thesocket a slight pressure the loop,

The loop 3 is preferably formed with a protuberance 15 projectinginwardly of the loop. ,Vhen the connecting plug, which is not shownsince it is of familiar form, is inserted through the aperture 2 in thebaseplate, the presence of the protuberance 15 requires the side of theloop 3 to ex'or arch to permit the passage of the plug prongs, Sinceboth ends of the loop are prevented from moving, this'eXert-s arelatively heavy pressure against the prongs by the spring contact, thusgiving a low resistance electrical connection. i

I claim:

l. A plug receptacle comprising a baseplate apertured to ,receive a plugcontact, a

.resilient contact strip secured to said baseplate and having a portionprojecting from the plane of the base-plate and registered with saidaperture to engage said plug con-y tact, a socket member secured to thebaseplate and electrically connectedv to said coni tact strip, a contactplug formed to engage said socket member and having a flange surfacevformed thereon, and a latch formed on the end of said contact strip andadjacent said socket for engaging said ange surface.

2. A plug receptacle comprising a basevplate having an aperture thereinthrough which a contact plug isadapted to be in serted from one side ofthe base-plate; a re-` silient contact strip adjacent the opposite sideof the base-plate; said contact strip comprising a looped portionregistering with said aperture and withwhich said contact plug isadapted to engage, a second portion extending at substantially rightangles to and a third, portion extending at substantially right langlesto the second portion and having a latch formed at the end thereof; anda socket member securing said second portion to the base-plate andhaving its end adjacent said latch whereby the latch may retain a secondcontactV plug in said socket. A

In testimony whereof, I have hereunto set my hand. v

RALPH M. HEIN TZ.

